Just placed the order for the parts thru Digikey.
I already have some of the common items like connectors, resistors and capacitors; as well as a suitable benchtop power supply.
Otherwise I pretty much ordered everything else right off the parts list.
Total for parts (including US$30 shipping) was AU$98, so all up cost for the tester will be AU$260 delivered.
Of course I'll still need to assemble it once it all arrives. Looks like some SMD soldering involved, so i'd better get out the magnifying glass.